\documentclass{beamer}
\beamertemplateballitem
\begin{document}
\title[beam]{international finance}
\author{xing}

%page break
\frame{\titlepage}
\section*{Outline}

\section{here are some notes}

%page break
\frame{\frametitle{basic}}
\setlength {\fboxsep}{4pt} 
\fbox{x}

\begin{itemize}
\[
\bar {s_t} = - (k-k^*)  - (m_t - m_t^*) - \phi(k-k^*)+ \lambda (\pi_{t+1} - \pi_{t+1}^*) - \frac {1}{\alpha}[(i_t - \pi_{t+1}) - (i_t^* - \pi_{t+1}^*)]  
\]

\end{document}
